Blind and blind production method

Abstract

To provide a technique which allows plural slats to tilt as one.SOLUTION: A blind comprises: a pair of slats 3 including elongated two upper slats 31 and lower slats 32 mutually restricting relative movement in a short direction by being overlapped; and a ladder cord 4 supporting the pair of slats 3 to enable tilting. When the pair of slats 3 are tilted by the ladder cord 4, the upper slats 31 and the lower slats 32 are tilted as one.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present embodiment relates to a blind having slats and a method for manufacturing the same. [Background technology]

[0002] A conventional blind of this type is shown in Patent Document 1 below. This blind supports multiple slats horizontally at intervals above and below with ladder cords, and the slats are raised and lowered by lifting cords that extend vertically through each slat. The blind is characterized in that two slats are supported by being stacked on top of each other on each step of the ladder cord, and the through hole for passing the lifting cord in one of the slats is an oblong hole that is long in the front-to-rear direction of the blind, and a notch is formed in the part of the slat that contacts the ladder cord, so that when the slat tilts, the slat shifts downward relative to the other slat. This feature makes it possible to completely block the gap between the slats supported on each step when the slats tilt. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Publication No. 62-36946 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in blinds configured to support multiple slats in an overlapping manner as described above, when one slat is tilted, the other slat is shifted downward relative to the other slat, which leads to a decrease in design. Therefore, it has been desired to be able to tilt multiple slats as a unit without causing any relative shifting.

[0005] The present invention has been made to solve the above-mentioned problems, and has an object to provide a technique that enables a plurality of slats to be tilted integrally. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the present invention comprises a shielding section having two elongated slats that overlap to restrict relative movement between each other in the short direction, and a ladder cord that supports the shielding section so that it can be tilted, and when the shielding section is tilted by the ladder cord, the two slats tilt as one unit. Effect of the Invention

[0007] According to the present invention, a technique can be provided that enables a plurality of slats to be tilted integrally. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a front view showing a configuration of a blind according to a first embodiment. [Diagram 2] FIG. 1 is an exploded perspective view showing the configuration of a slat pair of a blind according to a first embodiment. [Diagram 3] FIG. 2 is a perspective view showing the configuration of a slat pair and a ladder cord of the blind according to the first embodiment. [Figure 4] 1 is a schematic vertical cross-sectional view of a blind according to a first embodiment. [Diagram 5] FIG. 11 is an exploded perspective view showing the configuration of a slat pair according to a second embodiment. [Figure 6] FIG. 6 is a schematic vertical cross-sectional view of a blind according to a second embodiment. [Figure 7] FIG. 11 is a schematic vertical cross-sectional view of a blind according to a third embodiment. [Figure 8] FIG. 10 is a schematic vertical cross-sectional view of a blind according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the present invention will be described as being applied to a horizontal blind having a plurality of slats as a shielding material. In this embodiment, the surface facing the room when the blind is installed will be referred to as the front, the surface facing the outside of the room as the back, the direction consisting of the front and back as the front-rear direction, and the longitudinal direction of the blind as the left-right direction. In this specification and drawings, components having substantially the same functions will be denoted by the same reference numerals to avoid redundant description.

[0010] <First embodiment> (Overall composition) The overall configuration of the blind according to the first embodiment will be described. Fig. 1 is a front view showing the configuration of the blind according to this embodiment. Fig. 1 shows a state in which the bottom rail is lowered to the lowest position, and the components built into the head box are shown by partially showing the head box.

[0011] As shown in Figure 1, the blind 1 of this embodiment comprises a head box 2, a plurality of slat pairs 3, a plurality of ladder cords 4, a plurality of lifting cords 5, a bottom rail 6, an operating member 7, a drive shaft 22, a plurality of drum devices 23, a stopper (not shown), and a pulley (not shown).

[0012] The head box 2 is formed in a substantially rectangular parallelepiped shape that defines an internal storage space, and is fixed to a window frame (not shown) or the like via a plurality of brackets 21. A drive shaft 22, a drum device 23 having a winding drum and a rotating drum, and a stopper and a pulley (not shown) are housed within the head box 2. In addition, an operating member 7 hangs down from one end of the head box 2.

[0013] The multiple slat pairs 3 are supported between the head box 2 and the bottom rail 6 by ladder cords 4 hanging down from the head box 2 so as to be arranged in multiple positions in the up-down direction. The slat pairs 3 are made up of upper slats 31 and lower slats 32 which are formed long so as to extend in the left-right direction. The upper slats 31 and lower slats 32 will be described in detail later.

[0014] Each of the multiple ladder cords 4 has a pair of vertical cords 41 (see FIG. 3) having one end connected to the rotating drum of the corresponding drum device 23 so as to be able to be wound and unwound, hanging down from the head box 2, and the other end connected to the bottom rail 6. Each of the pair of vertical cords 41 is individually arranged in front of and behind the slat pair 3 so as to sandwich the slat pair 3, thereby supporting the slat pair 3. A detailed description of the slat pairs 3 and the ladder cords 4 will be given later.

[0015] Each of the multiple lifting cords 5 is for lifting and lowering the slat pair 3, and has one end connected to a winding drum of the corresponding drum device 23 so as to be capable of being wound and unwound, and the other end passes through a notch 34 (see FIG. 3) formed in the slat pair 3, which will be described later, and is connected to the bottom rail 6. With this connection, each of the multiple lifting cords 5 suspends and supports the bottom rail 6. Details of the notch 34 will be described later.

[0016] The bottom rail 6 is suspended and supported at the lowest end of the blind 1 by a lifting cord 5 hanging down from the head box 2.

[0017] The operating member 7 is a member formed in the shape of an endless string. The operating member 7 is wound around a pulley (not shown) that is provided in the head box 2 at one end of the drive shaft 22 so as to be capable of transmitting rotation. The operating member 7 hangs down from the head box 2 in a state where it is wound around the pulley so that it can be pulled by an operator. By pulling either the indoor side or the outdoor side of the hanging operating member 7, the drive shaft 22 is rotated in one direction or the opposite direction via the pulley.

[0018] The drive shaft 22 is rotatably supported in the head box 2 so that its axial direction faces the longitudinal direction of the head box 2, i.e., the left-right direction. The winding drum and the rotating drum in each of the multiple drum devices 23 are rotated by the drive shaft 22. The rotation of the drive shaft 22 is restricted by a stopper when a predetermined operation (such as stopping pulling, pulling only a predetermined amount, etc.) is performed on the operating member 7.

[0019] The winding drum in each of the multiple drum devices 23 is rotated in one direction or the other by the drive shaft 22 to wind or unwind the connected lifting cord 5 to lift or lower the bottom rail 6, thereby lifting or lowering the slat pairs 3. In addition, the rotating drum in each of the multiple drum devices 23 is rotated by the drive shaft 22 through a predetermined angle range, whereby the front and rear ladder cords 4 move relatively in the vertical direction, rotating the slat pairs 3.

[0020] (Slat vs. 3) The slat pair 3 according to this embodiment will be described in detail below with reference to Figs. 2 to 4. Fig. 2 is an exploded perspective view showing the configuration of the slat pair of the blind according to this embodiment, and Fig. 3 is a perspective view showing the configuration of the slat pair and ladder cord of the blind according to this embodiment. Fig. 4 is a schematic vertical cross-sectional view of the blind according to this embodiment, in which (a) shows a vertical cross-section of the slat pair in a horizontal state seen from the side, and (b) shows a vertical cross-section of the slat pair in a fully closed state seen from the side. In both Figs. 4(a) and 4(b), only the upper slat pair 3 is shown in a vertical cross-section passing through the notch 34, and the other slat pairs 3 are shown in side views, with the lift cord 5 omitted for the sake of explanation. In addition, the reference characters Fr and Ba shown in Figs. 4(a) and 4(b) indicate the front side and the back side, respectively.

[0021] 2 to 4, the slat pair 3 according to this embodiment includes an upper slat 31 formed in a substantially S-shape when viewed from the left-right direction, and a lower slat 32 that has the same shape as the upper slat 31 and is located below the upper slat 31. Since the upper slat 31 and the lower slat 32 have the same shape, the front-rear positions of both ends in the short side direction and the long side direction are substantially the same, that is, both ends are aligned. The upper slat 31 and the lower slat 32 can be made of a resin such as polycarbonate, a metal such as aluminum, wood, or a cloth material.

[0022] In this embodiment, by overlapping the upper slats 31 and the lower slats 32, the upper slats 31 and the lower slats 32 function as a single shielding member. This is because the upper slats 31 and the lower slats 32 have the same shape, and therefore the upper surface of the lower slat 32 can be in uniform surface contact with the lower surface of the upper slat 31, and thus they can be closely attached to each other, preferably airtightly, so that relative movement in the short side direction and the long side direction is impossible. In particular, each of the upper slats 31 and the lower slats 32 is formed in a generally S-shape in side view, which is a shape that is curved in the short side direction, and therefore relative movement in the short side direction is reliably restricted.

[0023] Specifically, in a plan view, each of the upper slat 31 and the lower slat 32 is curved so that one side in the short side direction (the rear side Ba side) bends downward to form a concave curved portion 331, and the other side in the short side direction (the front side Fr side) bends upward to form a convex curved portion 332. By stacking the upper slat 31 and the lower slat 32 vertically, the concave curved portions 331 of each other are stacked and come into uniform surface contact with each other with matching shapes. Similarly, the convex curved portions 332 of each other are stacked and come into uniform surface contact with each other with matching shapes. As a result, the movement of the upper slat 31 in the short side direction is restricted by the concave curved portion 331 and the convex curved portion 332 of the lower slat 32, and similarly, the movement of the lower slat 32 in the short side direction is restricted by the concave curved portion 331 and the convex curved portion 332 of the upper slat 31.

[0024] As shown in Fig. 3, the upper slats 31 and the lower slats 32 each have a notch 34 formed at one end in the short side direction (the rear face Ba side) through which the lift cord 5 is inserted. Since the upper slats 31 and the lower slats 32 have the same shape, when they are stacked, the left-right positions of the notches 34 are approximately the same, and the lift cord 5 can be inserted vertically. In this embodiment, the blind 1 has two lift cords 5, and therefore the upper slats 31 and the lower slats 32 each have a notch 34 formed at a position corresponding to the two lift cords 5. The position of the notch 34 is not limited to the rear face Ba side, but may be the front face Fr side.

[0025] As shown in FIG. 3, the ladder cord 4 has a pair of vertical cords 41 that are spaced apart from each other in the front and rear and that hang down from the head box 2. Between the pair of vertical cords 41, two middle cords 421, 422 are connected at a distance from each other in the vertical direction, with both ends of each cord individually connected to the pair of vertical cords 41. The slat pair 3 is supported so as to be able to tilt while being inserted between the two middle cords 421, 422. As a result, as shown in FIG. 4(a), the middle cord 421 contacts the upper surface of a part of the upper slat 31 in the slat pair 3, and the middle cord 422 contacts the lower surface of a part of the lower slat 32. Due to this contact, the upper slat 31 and the lower slat 32 are sandwiched from above and below by the two middle cords 421, 422, and are supported in a stable state while being prevented from moving in the vertical direction. The upper slat 31 and the lower slat 32 may be biased from both above and below by two middle cords 421, 422.

[0026] For this reason, the upper slats 31 and the lower slats 32 can maintain their overlapped state without separating from each other, not only in the horizontal state shown in Fig. 4(a) but also in the fully closed state in a nearly vertical position shown in Fig. 4(b). In other words, the effect of restricting the relative movement of the upper slats 31 and the lower slats 32 by overlapping them can be further enhanced during tilting. This is also true even when the slat pair 3 is in a semi-fully closed state.

[0027] 4(b), in the fully closed state, the other end of the slat pair 3 in the short direction is tilted downward, but the other end of the short direction of both the upper slat 31 and the lower slat 32 is supported by the middle cord 422. In addition, contact between the middle cord 421 and the upper slat 31 and contact between the middle cord 422 and the lower slat 32 are maintained, so the overlapping state of the slats is maintained.

[0028] In addition, because the upper slats 31 and the lower slats 32 are formed in a roughly S-shape, one end of the slat pair 3 in the short side direction overlaps in the front-rear direction with the other end of the slat pair 3 located above in the fully closed state and in the half-fully closed state. That is, the other end of the slat pair 3 in the short side direction also overlaps in the front-rear direction with one end of the slat pair 3 located below. This overlap makes it possible to completely block the gaps between the multiple slat pairs 3 that are spaced apart from each other above and below, and achieves high shielding properties.

[0029] The method of attaching the slat pairs 3 to the ladder cord 4, which is part of the manufacturing method of such blinds 1, simply involves stacking the upper slat 31 and the lower slat 32 vertically to form the slat pair 3 when the ladder cord 4 is completed, and then inserting this slat pair 3 between the middle cords 421 and 422. Therefore, this attachment method does not increase the number of work steps compared to existing methods, and only adds the extremely simple task of stacking the upper slats 31 and the lower slats 32 vertically, with almost no increase in time cost.

[0030] According to the present embodiment described above, the upper slat 31 and the lower slat 32, which each bend in the short direction, can be restricted from moving relative to each other with a simple configuration of simply stacking them one above the other, and the two slats can be tilted integrally when tilting. Furthermore, since the slat pair 3 is composed of two slats, it is naturally possible to improve the strength in the vertical direction, that is, the robustness, as well as the thermal insulation, compared to a configuration composed of one slat.

[0031] In addition, since the slat pair 3 is inserted between the middle cords 421, 422, it is possible to prevent the upper slat 31 and the lower slat 32 from moving apart in the vertical direction not only when the slat is horizontal but also when the slat is tilted. In addition, since the lifting cord 5 is inserted through the notch 34 of the upper slat 31 and the lower slat 32, it is possible to tilt the two slats integrally when the slat is tilted and improve the shielding performance. Furthermore, since the lifting cord 5 is inserted through the notch 34, it is possible to prevent the upper slat 31 and the lower slat 32 from moving relative to each other in the longitudinal direction. In addition, since the upper slat 31 and the lower slat 32 have the same shape, it is not necessary to prepare slats of multiple shapes, which is also advantageous in terms of cost.

[0032] In addition, since the upper slats 31 and the lower slats 32 can be of different colors, it is possible to change the color of the blind 1 seen from the inside or outside of the room depending on whether it is in the fully closed state or the half-closed state, and a blind with a two-tone design can be easily realized. Since a considerable number of slat colors can be selected, it is possible to increase the variation in the design of the blind 1. In addition, it is possible to expand the function of the blind 1 by selecting the slat color, such as by making the lower slats 32 white to improve the heat insulation. In addition, since the upper slats 31 and the lower slats 32 are inserted into the middle cords 421 and 422, they can be easily removed. Therefore, the color combination of the upper slats 31 and the lower slats 32 can be freely changed according to changes in the environment, such as changing the wallpaper, or changes in the user's mood.

[0033] In this embodiment, the slat pair 3 is described as being composed of two slats, but it may be composed of three or four slats, etc. By forming the slat pair 3 from a larger number of slats, further improvement in robustness can be expected.

[0034] In addition, although the upper slats 31 and the lower slats 32 have been described as having the same shape, this is not limited thereto, and they may be curved in the short side direction and be in surface contact with each other so as to be immovable relative to each other. For example, either the upper slats 31 or the lower slats 32 may be shorter in the short side direction or the long side direction, one may have a different design from the other, or only a part of the upper slats 31 and the lower slats 32 may be curved in the short side direction to be in surface contact with each other and the other part may be spaced apart.

[0035] Furthermore, if shielding performance is not a consideration, in place of the notches 34 in the upper slats 31 and the lower slats 32, an insertion hole extending in the short side direction and through which the lift cord 5 can be inserted may be provided at approximately the center in the short side direction.

[0036] In addition, both ends of middle tier cord 421 may be connected to vertical cord 41 at a position lower than both ends of middle tier cord 422, thereby forming an intersection portion in middle tier cords 421, 422, and slat pair 3 may be inserted through this intersection portion to sandwich slat pair 3 from above and below between middle tier cords 421, 422.

[0037] <Second embodiment> The slat pair according to this embodiment differs from the slat pair 3 according to the first embodiment in that a heat insulating member is interposed between the upper slat 31 and the lower slat 32.

[0038] Fig. 5 is an exploded perspective view showing the configuration of the slat pair according to this embodiment. Fig. 6 is a schematic vertical cross-sectional view of the blind according to this embodiment, where (a) shows a vertical cross-section of the slat pair in a horizontal state as seen from the side, and (b) shows a vertical cross-section of the slat pair in a fully closed state as seen from the side. Note that in both Fig. 6(a) and Fig. 6(b), only the upper slat pair 3A is shown in a vertical cross-section passing through the notch 34, and the other slat pairs 3A are shown in side views, with the lift cord 5 omitted for ease of explanation.

[0039] As shown in Figures 5 and 6(a), the slat pair 3A of the blind 1A according to this embodiment differs from the slat pair 3 according to the first embodiment in that a heat insulating sheet 35, which is a heat insulating member, is interposed between the upper slat 31 and the lower slat 32. The heat insulating sheet 35 is formed in a shape that is substantially the same as or slightly smaller than the upper slat 31 and the lower slat 32 so as not to impair the design of the slat pair 3A. The heat insulating sheet 35 is preferably made of a material having heat insulating properties, that is, a material such as resin having low thermal conductivity (e.g., foamed plastic).

[0040] According to such a slat pair 3A, even if the heat insulating sheet 35 is interposed, the upper slat 31 and the lower slat 32 are overlapped with a shape curved in the short direction, so that the relative movement between them can be restricted even in the fully closed state and in the tilting process from the horizontal state to the fully closed state as shown in FIG. 6(b). This is also true in the half-closed state. Therefore, although the slat pair 3A has the same function as the slat pair 3 according to the first embodiment, the heat insulating property is further improved with a simple configuration by having the heat insulating sheet 35. The heat insulating sheet 35 may not be simply sandwiched between the upper slat 31 and the lower slat 32, but may be adhered to each of the upper slat 31 and the lower slat 32 via an adhesive layer. In this case, it is preferable to use a sheet-like material having an adhesive force that can be easily attached and detached to the slats by hand as the adhesive layer from the viewpoint of facilitating replacement of the slats.

[0041] <Third embodiment> The slat pair according to this embodiment differs from the slat pair 3 according to the first embodiment in that the upper slats 31 and the lower slats 32 are made of different materials.

[0042] Fig. 7 is a schematic vertical cross-sectional view of the blind according to this embodiment, where (a) shows a vertical cross-section of a slat pair in a horizontal state as seen from the side, and (b) shows a vertical cross-section of a slat pair in a fully closed state as seen from the side. Note that in both Fig. 7(a) and Fig. 7(b), only the upper slat pair 3B is shown in a vertical cross-section passing through the cutout 34, and the other slat pairs 3B are shown in side views, with the lift cord 5 omitted for ease of explanation.

[0043] As shown in Fig. 7(a), the slat pair 3B of the blind 1B according to this embodiment differs from the slat pair 3 according to the first embodiment in that it has a lower slat 32B made of a material different from that of the upper slat 31, instead of the lower slat 32. The lower slat 32B according to this embodiment has the same shape as the upper slat 31 in a plan view, but is thicker than the upper slat 31. On the other hand, the lower slat 32B is formed in a roughly S-shape in a side view, which is the same shape as the upper slat 31, and like the lower slat 32 according to the first embodiment, the upper surface of the lower slat 32B can be in uniform surface contact with the lower surface of the upper slat 31, and can be stacked closely one on top of the other.

[0044] According to such a slat pair 3B, for example, when the upper slat 31 is made of metal or plastic material, the lower slat 32B can be made of wood or the like, and the blind 1B can have a different design when viewed from the front Fr side and the back Ba side. Even if the lower slat 32B is made of a material different from the upper slat 31, the upper slat 31 and the lower slat 32B are overlapped with a shape curved in the short side direction, so that the relative movement between them can be restricted even in the fully closed state and in the tilting process from the horizontal state to the fully closed state as shown in FIG. 7(b). This is also true in the half-fully closed state. Therefore, although the slat pair 3B has the same function as the slat pair 3 according to the first embodiment, the design can be improved by having the lower slat 32B. Furthermore, for example, if either the upper slats 31 or the lower slats 32B are made of a material with low thermal conductivity, a blind with excellent insulating properties can be realized. By appropriately selecting the materials for the upper slats 31 and the lower slats 32B, it is possible to impart new functions to the blind 1B.

[0045] <Fourth embodiment> The slat pair according to this embodiment differs from the slat pair 3 according to the first embodiment in that an upper slat 31 and a lower slat 32 are formed in a generally L-shape in side view.

[0046] Fig. 8 is a schematic vertical cross-sectional view of the blind according to this embodiment, where (a) shows a vertical cross-section of a slat pair in a horizontal state as seen from the side, and (b) shows a vertical cross-section of a slat pair in a fully closed state as seen from the side. Note that in both Fig. 8(a) and Fig. 8(b), only the upper slat pair 3C is shown in a vertical cross-section passing through the cutout 34, and the other slat pairs 3C are shown in side views, with the lift cord 5 omitted for ease of explanation.

[0047] As shown in Fig. 8(a), the slat pair 3C of the blind 1C according to this embodiment is different from the slat pair 3 according to the first embodiment in that it has an upper slat 31C and a lower slat 32C instead of the upper slat 31 and the lower slat 32. Each of the upper slat 31C and the lower slat 32C is formed in a generally L-shape in a side view, which is a shape curved in the short side direction. Therefore, the upper slat 31C and the lower slat 32C are reliably restricted from moving relative to each other in the short side direction.

[0048] Specifically, each of the upper slats 31C and the lower slats 32C has a short piece 361 on one side in the short direction (the rear face Ba side) and a long piece 362 that is integrally connected to the other side in the short direction of the short piece 361 (the front face Fr side) and is longer in the short direction than the short piece 361. The short piece 361 and the long piece 362 are connected to form a predetermined angle (obtuse angle), and therefore each of the upper slats 31C and the lower slats 32C is formed with a convex bent portion 333 that bends upwardly, which is closer to one side in the short direction. Since the upper slats 31C and the lower slats 32C have the same shape, when they are stacked one above the other, the convex bent portions 333 are stacked and come into uniform surface contact with each other with matching shapes. As a result, the movement of the upper slat 31C in the short side direction is restricted by the convex bent portion 333 of the lower slat 32C, and similarly, the movement of the lower slat 32C in the short side direction is restricted by the convex bent portion 333 of the upper slat 31C.

[0049] According to such a slat pair 3C, even if it is formed into a substantially L-shape in a side view, the upper slat 31C and the lower slat 32C are overlapped with a shape curved in the short side direction, so that the relative movement between them can be restricted even in the fully closed state and in the tilting process from the horizontal state to the fully closed state as shown in FIG. 8(b). This is also true in the half-fully closed state. Moreover, one end of the short side of the slat pair 3C overlaps in the front-rear direction with the other end of the short side of the slat pair 3C located above in the fully closed state and the half-fully closed state, and the other end of the short side of the slat pair 3C can overlap in the front-rear direction with one end of the short side of the slat pair 3C located below. Therefore, the slat pair 3C can have the same function as the slat pair 3 according to the first embodiment.

[0050] The shape of the slats is not limited to a substantially S-shape or L-shape in side view, and may be flat. In this case, the material and smoothness of the contact surface may be adjusted to generate intermolecular forces between the upper slats and the lower slats to make them adhere to each other. Similarly, the upper slats and the lower slats may be pressured in a direction to approach each other, and the space between the slats may be made substantially vacuum to make them adhere to each other. The upper slats and the lower slats may also be bonded to each other using an adhesive, preferably a sheet-like adhesive. In this case, it is preferable that the adhesive strength is such that the upper slats and the lower slats can be easily peeled off by the user, since this allows the slats to be replaced.

[0051] Furthermore, all of the shielding members of the blind do not have to be the slat pairs 3, 3A to 3C, and only some of the shielding members may be the slat pairs 3, 3A to 3C, and other shielding members may be composed of a single slat.

[0052] The present invention can be implemented in various other forms without departing from the spirit or main features thereof. Therefore, the above-described embodiments are merely illustrative in all respects and should not be interpreted as being limiting. The scope of the present invention is defined by the claims and is not limited to the text of the specification. Furthermore, all modifications, various improvements, substitutions and alterations within the scope of the claims are within the scope of the present invention. [Explanation of symbols]

[0053] 1,1A,1B,1C Blinds 2 Head Box 3 Slat Pair (Shielding Part) 31, 31C Upper slat (one of the two slats, the first slat) 32, 32B, 32C Lower slat (the other of the two slats, the second slat) 331 Concave curved portion (regulating portion, curved portion) 332 Convex curved portion (regulating portion, curved portion) 333 Convex bent portion (restriction portion, bent portion) 34 Notch 35 Heat Insulation Sheet 4 Ladder Code 41 Vertical Code 421,422 Middle Code

Claims

1. A shielding portion having two elongated slats that overlap to restrict relative movement of the slats in the short direction; a ladder cord that supports the shielding portion so that the shielding portion can tilt; Equipped with When the shielding part is tilted by the ladder cord, the two slats tilt together. A blind characterized by:

2. Each of the two slats has a shape curved in the short-side direction and has a restricting portion that restricts the relative movement by overlapping with each other when the two slats overlap.

2. The blind according to claim 1.

3. The two slats are formed in the same shape, Each of the two slats is curved into a substantially S-shape to form two curved portions as the restricting portion, The two slats overlap each other such that the curved portions are vertically overlapped, thereby restricting the relative movement.

3. The blind according to claim 2.

4. The two slats are formed in the same shape, Each of the two slats is bent into a substantially L-shape to form a bent portion as the restricting portion, The two slats overlap each other such that the bent portions overlap each other vertically, thereby restricting the relative movement.

3. The blind according to claim 2.

5. The slats further include a heat insulating member interposed between the two slats.

2. The blind according to claim 1.

6. The two slats are made of different materials.

2. The blind according to claim 1.

7. The two slats are different in color from each other.

2. The blind according to claim 1.

8. The ladder cord includes a pair of vertical cords spaced apart from each other in the short side direction suspended from a head box of the blind, Two middle cords are connected between the pair of vertical cords, and both ends of each middle cord are individually connected to each of the pair of vertical cords, The shielding portion is inserted between the two middle cords and is supported by the ladder cord so as to be tiltable. A blind according to any one of claims 1 to 7.

9. Further, a lifting cord for lifting and lowering the shielding part is provided, the lifting cord being suspended from the head box and disposed on one side or the other side in the short direction of the shielding part, A notch through which the lift cord is inserted is formed at one end of each of the two slats in the short side direction facing the lift cord.

9. The blind according to claim 8.

10. By stacking two elongated slats, the two slats become a shielding portion in which the relative movement of the two slats in the short direction is restricted, The shielding portion is attached to a ladder cord for supporting the shielding portion so as to be tiltable. A method for manufacturing blinds comprising the steps of:

11. The ladder cord includes a pair of vertical cords that are suspended from a head box of the blind and spaced apart from each other in the short side direction, Two middle cords are connected between the pair of vertical cords, and both ends of each middle cord are individually connected to each of the pair of vertical cords, The shielding portion is detachably attached to the ladder cord by inserting the shielding portion between the two middle cords from a direction perpendicular to the short side direction. A method for manufacturing a blind according to claim 10.

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